21132111001 has 16 divisors (see below), whose sum is σ = 23126632704. Its totient is φ = 19231285504.

The previous prime is 21132110999. The next prime is 21132111023. The reversal of 21132111001 is 10011123112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21132111001 - 2¹ = 21132110999 is a prime.

It is a super-2 number, since 2×21132111001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132111401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93010 + ... + 225643.

It is an arithmetic number, because the mean of its divisors is an integer number (1445414544).

Almost surely, 2^21132111001 is an apocalyptic number.

It is an amenable number.

21132111001 is a deficient number, since it is larger than the sum of its proper divisors (1994521703).

21132111001 is a wasteful number, since it uses less digits than its factorization.

21132111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318800.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21132111001 its reverse (10011123112), we get a palindrome (31143234113).

The spelling of 21132111001 in words is "twenty-one billion, one hundred thirty-two million, one hundred eleven thousand, one".